import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sca = new Scanner(System.in);
        System.out.println("输入一个整数:");
        int num = sca.nextInt();
        if(num>0){
            System.out.println("正数");
        }else if(num<0){
            System.out.println("负数");
        }
        else{
            System.out.println(0);
        }
    }
}
